Viruses like influenza, Ebola and Zika can spread widely around the world through shipping, travel and other ways we humans move things from one place to another. DNA sequencing can provide a roadmap that a virus has followed to get where it is today. Watch as researchers use DNA sequencing to create a powerful tool to track the spread of the Zika virus around the world.

Your armpits carry millions of tiny microbial passengers. Watch scientists study the ecosystem of the armpit and learn how deodorants can affect not only your social life, but also your microbial life.

Chemicals surround us: in the air, the water, our food, our clothes and our furniture. Which ones are dangerous? How much of them is dangerous? Watch as EPA scientists in Research Triangle Park use chemical toxicology tests to answer these questions.